Hysteroscopy is an outpatient procedure in which the uterine cavity is evaluated with a very small lighted scope.  It allows the diagnosis and treatment of uterine polyps, small uterine fibroids, abnormal uterine bleeding and abnormalities of the uterine cavity shape. 

(D&C) refers to the dilation (widening/opening) of the cervix and surgical removal of part of the lining of the uterus and/or contents of the uterus by scraping and scooping (curettage). It is a therapeutic gynecological procedure as well as a way to treat first trimester miscarriage.